Basis of Presentation and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Schedule of Product Revenue Allowance and Reserve Categories

The following table summarizes activity in each of the product revenue allowance and reserve categories for the nine months ended September 30, 2018.

	Chargebacks			Government Rebates			Total
	(in thousands)
Balance at December 31, 2017:	$	927		$	7,961		$	8,888
Provision related to current period sales		2,539			21,668			24,207
Provision related to prior period sales		—			181			181
Credit or payments made during the period		(2,163	)		(18,653	)		(20,816	)
Balance at September 30, 2018:	$	1,303		$	11,157		$	12,460